All of these seem to be likely causes, Banks wrote, and it is superficially plausible that by remarkable good fortune they converged to spark the Renaissance. Unfortunately, he continued, the actual existence of most of these factors is contradicted by the historical record. While socially mobile, Florence in the 1400s wasn't unusually prosperous, peaceful, or free. In fact, the city was recovering from a disastrous plague, was divided by vigorous fighting among powerful families, and was ruled by the church's iron fist.